CVE-2026-2303

Description

The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap out-of-bounds read vulnerability due to incorrect assumptions about string termination in the GSSAPI standard. Since GSSAPI buffers are not guaranteed to be null-terminated or have extra padding, this results in reading one byte past the allocated heap buffer.

CVSS Metrics

• v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
• v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
• v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS Trends

Current EPSS score: 0.23%• Percentile: 14%

Techniques & Countermeasures

• CWE-183•Permissive List of Allowed Inputs

  The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses.

Affected Systems

• chainguard•agentbeat

  < 9.2.7-r14

• chainguard•agentbeat-fips

  < 9.2.7-r13

• chainguard•amazon-cloudwatch-agent

  < 1.300070.0-r2 | < 0 | < 1.300073.0-r1

• chainguard•amazon-cloudwatch-agent-fips

  < 1.300070.0-r0

• chainguard•argo-cd-3.0

  all

• chainguard•argo-cd-3.0-compat

  all

• chainguard•argo-cd-3.1

  all

• chainguard•argo-cd-3.1-compat

  all

• chainguard•argo-cd-3.2

  < 3.2.12-r3

• chainguard•argo-cd-3.2-compat

  < 3.2.12-r3

• chainguard•argo-cd-3.3

  < 3.3.12-r2

• chainguard•argo-cd-3.3-compat

  < 3.3.12-r2 | all | < 0

• chainguard•argo-cd-fips-3.0

  all

• chainguard•argo-cd-fips-3.0-compat

  all

• chainguard•argo-cd-fips-3.1

  all

• chainguard•argo-cd-fips-3.1-compat

  all

• chainguard•argo-cd-fips-3.2

  < 3.2.12-r7

• chainguard•argo-cd-fips-3.2-compat

  < 3.2.12-r7

• chainguard•argo-cd-fips-3.3

  < 3.3.12-r1

• chainguard•argo-cd-fips-3.3-compat

  < 3.3.12-r1

• chainguard•authentik-2025.12-go-server

  all

• chainguard•authentik-2026.2-go-server

  < 2026.2.4-r7

• chainguard•authentik-fips-2025.12-go-server

  all

• chainguard•authentik-fips-2026.2-go-server

  < 2026.2.4-r5

• chainguard•bento

  < 1.18.1-r2

• chainguard•bento-fips

  < 1.18.1-r1

• chainguard•cilium-1.16

  all

• chainguard•cilium-1.16-clustermesh-apiserver

  all

• chainguard•cilium-1.16-hubble-relay

  all

• chainguard•cilium-1.16-operator-aws

  all

• chainguard•cilium-1.16-operator-generic

  all

• chainguard•cilium-1.17

  < 1.17.17-r2

• chainguard•cilium-1.17-clustermesh-apiserver

  < 1.17.17-r2

• chainguard•cilium-1.17-hubble-relay

  < 1.17.17-r2

• chainguard•cilium-1.17-operator-aws

  < 1.17.17-r2

• chainguard•cilium-1.17-operator-generic

  < 1.17.17-r2

• chainguard•cilium-1.18

  < 1.18.11-r2

• chainguard•cilium-1.18-clustermesh-apiserver

  < 1.18.11-r2

• chainguard•cilium-1.18-hubble-relay

  < 1.18.11-r2

• chainguard•cilium-1.18-operator-aws

  < 1.18.11-r2

• chainguard•cilium-1.18-operator-generic

  < 1.18.11-r2

• chainguard•cilium-1.19

  < 1.19.5-r2

• chainguard•cilium-1.19-clustermesh-apiserver

  < 1.19.5-r2

• chainguard•cilium-1.19-hubble-relay

  < 1.19.5-r2

• chainguard•cilium-1.19-operator-aws

  < 1.19.5-r2

• chainguard•cilium-1.19-operator-generic

  < 1.19.5-r2 | all

• chainguard•cilium-fips-1.16

  all

• chainguard•cilium-fips-1.16-clustermesh-apiserver

  all

• chainguard•cilium-fips-1.16-host-utils

  all

• chainguard•cilium-fips-1.16-hubble-relay

  all

Showing first 50 affected entries in server-rendered view.

References (4)

• https://jira.mongodb.org/browse/GODRIVER-3770
• https://nvd.nist.gov/vuln/detail/CVE-2026-2303
• https://github.com/mongodb/mongo-go-driver
• https://github.com/advisories/GHSA-cp6g-7hqx-qxhp